added new files

assets/js/common.js

@@ -0,0 +1,19 @@
+const serverUrl = 'http://localhost:3088/';
+
+function getCookie(name) {
+  var nameEQ = name + '=';
+  var ca = document.cookie.split(';');
+  for (var i = 0; i < ca.length; i++) {
+    var c = ca[i];
+    while (c.charAt(0) == ' ') c = c.substring(1, c.length);
+    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
+  }
+  return null;
+}
+
+function isAuthenticated() {
+  if (getCookie('authentication')) {
+    return true;
+  }
+  return false;
+}